The knight on f4 is in a precarious situation. Black follows the natural plan, opening the f-file, but Antipov finds a convincing refutation.
14... h5f4 A new move. 15. f1g3 The problem with moving the black knight to f4 is that it's now difficult to see what to do. There's no sac on h3, and White intends to get the knight to f5. 15... e5d4 This plan worsens Black's position. 16. c3d4  16... d6d5 